Place the beef in a pan, add enough water to cover it and bring to a boil. Skim off any foam that rises. Reduce the heat, cover and simmer until the beef is very tender, about 1¼ to 1½ hours.
Soak the dried chilies in warm water for 10 to 15 minutes to soften. Then deseed and drain. Grind the drained chilies, fresh chilies, shallots and garlic to a smooth paste